栽培药材川续断地上部分体积估算的最优样方选择  

Selection of optimum quadrat size and number for estimating aboveground volume of cultivated Dipsacus asperoides

作　　者：朱寿东[1] 刘慧平[1] 黄璐琦[2] 王新村 张小波[2] 薛晓娟[1] 穆晓东[1] 程洁[4] 

机构地区：[1]北京师范大学地理学与遥感科学学院,北京100875 [2]中国中医科学院中药研究所,北京100700 [3]贵州同济堂制药有限公司,贵阳550009 [4]北京师范大学全球变化与地球系统科学研究院,北京100875

出　　处：《植物生态学报》2012年第2期151-158,共8页Chinese Journal of Plant Ecology

基　　金：国家高科技产业化项目(发改办高技[2010]1196);国家863计划(2006AA120102);国家自然科学基金(40671127);国家科技支撑计划(2008-BAK49B04)共同资助

摘　　要：以贵州省黔南州龙里县内人工栽培的川续断(Dipsacus asperoides)为研究对象,就如何选择最优样方的面积和数目来估算川续断地上部分体积进行了研究。首先运用球缺模型计算栽培川续断的地上体积,然后利用基于套状样方的样带调查法研究估算川续断体积时的最优样方面积,最后利用方差法计算最优采样数目。结果表明:(1)在只考虑相对平均值和相对消耗时,25m×25m是最优样方面积;在此基础上进一步考虑到样方的边界效应和单位面积地上体积相对平均值的变化,得出25m×50m是最优样方面积。(2)如果预计置信度1-α是0.9,绝对误差限度d是0.12,总体方差S2按照常规取0.25,则25m×50m对应的最佳样方数目是25。(3)该研究实际采集了25个25m×50m的样方,计算后得到整个栽培园地(面积为72696.24m2)川续断的总体积90%的近似置信区间为[1909.798m3,2214.762m3]。Aims In the traditional Chinese medicine resources survey process, quadrat size and number must be determined before surveying. Our objective is to determine how to select the optimal quadrat size and number for Dipsacus asperoides. Methods We examined D. asperoides cultivated in Longli, Qiannan Autonomous Prefecture, Guizhou Province. We first calculated aboveground volume of D. asperoides by a segment model. Then we selected the optimal quadrat size and number by using the quadrat-based transect survey method, and calculated the optimal quadrat number by the variance method. Important fndings When only considering of the relative mean of aboveground volume and relative time costs, 25 m × 25 m is the optimal size. But when further considering quadrat boundary effects and variation in relative mean of the aboveground volume, the optimal size is 25 m × 50 m. If the expected confidence level is 0.9, the absolute margin of error is 0.12, the population variance S^2 obtained conventionally is 0.25 and the optimal quadrat number is 25. This study sampled 25 quadrats of 25 m × 50 m within the entire area of the cultivated garden （72 696.24 m^2）. The total aboveground volume of D. asperoides with approximately 90% confidence located in the extent is [1909.798 m^3, 2214.762 m^3]. Results showed that the optimal quadrat size from the nested quadrats method and the segment model are useful in estimating the aboveground volume of cultivated D. asperoides, and they can provide a reference for other surveys.

关 键 词：球缺模型 边界效应 套状样方 最优样方 相对消耗 

分 类 号：S567.239[农业科学—中草药栽培]